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US 11,077,998 B2Granted
Packaging bag and manufacturing method therefor
AssigneeKyodo Printing Co., Ltd.
InventorsAtsushi Yasuda, Yuki Narita, Masa Inoue
Life of this patent
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Abstract
A packaging bag 100 having a heat-sealed part at an end and thereby formed into a bag shape, wherein the heat-sealed part 110 has an oxygen absorption layer 10, a water-vapor absorption layer 20, and a barrier layer 30, and wherein the oxygen absorption layer 10 contains an oxygen-deficient cerium oxide 11.
Claims14
A packaging bag having on an edge thereof a heat seal part with which the packaging bag is formed into a bag shape, said packaging bag comprising:
- an oxygen absorbing laminate film comprising a barrier layer and an oxygen absorbing layer, wherein the oxygen absorbing layer comprises an oxygen-deficient cerium oxide, and
- a water vapor absorbing laminate film comprising a barrier layer and a water vapor absorbing layer,
- wherein the oxygen absorbing laminate film and the water vapor absorbing laminate film are arranged opposite to each other so that the oxygen absorbing layer and the water vapor absorbing layer are located inwardly such that neither the oxygen absorbing layer nor the water vapor absorbing layer faces the interior of the packaging bag via the other absorbing layer, and
- wherein edges of the oxygen absorbing laminate film and the water vapor absorbing laminate film are heat-sealed to form the heat seal part and thereby form a bag shape.
1 more element
Dependencies are inferred from the claim text.